Nef-induced CCL2 Expression Contributes to HIV/SIV Brain Invasion and Neuronal Dysfunction

Area of Science:

• Neuroimmunology
• Virology
• Molecular Biology

Background:

• C-C motif chemokine ligand 2 (CCL2) is crucial for brain health but its dysregulation is linked to neurological diseases.
• Acquired immune deficiency syndrome (AIDS) encephalopathy is a severe complication of HIV/SIV infection.
• The HIV/SIV Nef protein, a key factor in AIDS pathology, can be transferred between cells and induces CCL2 expression.

Purpose of the Study:

• To review how Nef-induced CCL2 expression contributes to HIV and SIV neurotropism and neurovirulence.
• To explore the therapeutic potential of targeting CCL2 in HIV infection.

Main Methods:

• Review of existing literature on CCL2, HIV/SIV Nef protein, and neurological complications.
• Analysis of mechanisms by which Nef influences CCL2 expression and contributes to neuropathogenesis.

Main Results:

• Nef protein transfer via microvesicles and tunneling nanotubes (TNT) facilitates its spread to uninfected cells.
• Nef-induced CCL2 expression plays a significant role in the neurotropism and neurovirulence of HIV and SIV.
• CCL2's involvement in leukocyte recruitment to the brain exacerbates neuroinflammation.

Conclusions:

• Nef-induced CCL2 dysregulation is a critical factor in HIV/SIV-associated neurological damage.
• Targeting CCL2 presents a promising adjuvant therapeutic strategy for managing HIV-related neurological complications.